Grinding combination and device



Sept. 14, 1943. w. FAVlNl 2,329,191

GRINDING COMBINATION AND DEVICE Filed July 1, 1941 WILLIAM FAVINI block showinga centerless grinding; eat'orgroove carried thereby and a. rotatable c uclg is J hol dis supported throughoutor substantiallyjthrough Patented Sept. 14, 1943 ,2f,32 9,1a1 7 v H eccm mem a DEVICE William Favinil'south Ozone Park, N .Y.,.assigne -or to-AlbentDcMizzy, New :Y'ork,' N Y. neati aj ily 1 1941-, Seri'aLNo. 4005612 The invention relates to a grinding cqinbination and a grinding devicetobeused to taper grindav rod; orv tube the centerles grinding method. The combinationand;devicesto he described herein is particularly -d esi gne d to be; used 5 for taper grinding 'tubular. blanks to;be made into hypodermic needles.v 1

It-is an object of the invention togconstnupt a new and novel c6mbination; for; grinding; mall diametertubesand rods'by the centerles g d- 10 i t dl w Another, object of the; invention is to construct a grinding device whichisparticularly suitEd-Qfor centerless grinding 0f sma-ll diameter tubesand rods. V y

Another object is, to construct a; simplegrinding device to be used to taper grindisma 9 1 3 118,- ter tubes :or rods thecenterless. grindingymeth- 0d,, which device i adjustablet vary theaagngle of the taper,.; I I t A still furtherobject of v the inventio construct a, grindingdevice for grindin diameter rod or, tube by, the centerless; rindin method, which devicflqisp adjustable laterally for controlling. the amountto; be ground fromthe 2 5 ortllbe. f!

Other objects of the invention will be rnorte apparent from;the following description taken in conn on th the; ac omn nvin g mwma showing a preferred einbodiment of th Infill-3 0 i n, in' ch .5.

Figure 1 isan elevation of the grindinggl imposition; adjacentlth'e periphery ofa gri n t a u e p ate remov d in,--. to sh the e o veiw rece v h w li r 2 as /aw of; t timeshare andgrind-ing wheel,v I I Figure 3 is a section through he'supporting l ing a rod or tube to be groundi position ready for'insertio n in the groove wheregit will. be; rotated as it'is ground.. M The grinding device to be. described herein. is 4'5 designed-for small diameter tubing, or rodsyhich out its, length because; the rod or jtubebendslso easily( The combination. provides asimplelconstructi'onby whichthe tube'jor. rod to be ground rotated and is. designed tofobtainlh igh' production; f Q The grindingdevice includes a bas'e, in. wi adaptedto be secu'rdin anyfsuitableniahneii to table or plate adjacent to 'aerinding "wheel laims. i roller V I. II carriedupdn and. driven by a. shait, I 3, post l2 extends vertically fromjthe' base to forman L-shaped frame.

I A support [4 fsfmoumeqfupon. defame any suitable nianner' so astlo obtain latenal'adjustment thereoitowardsl and; away from the grinding wheel, whereby the depthjof out can beadjusted as desired. Inthe construction particularly illustrated, the support is slotted or forkedsso that the flanges. formed. thereby may pass 'over the base III and are. pivotedlthereto by means of a pin} [5. Meansare provided for-,adjusting: the. lateral position. of the-support upon the frame.v This adjusting. means comprises ,a

screw l fi which is rotatably secured; in the/post l suchasby meansofia nut II-ZL The screwv i6 is received in. a threaded, hole ,lt jin'. thesupport,

so ,that rotation. 10.: the screw angula'rly. adjusts the position ofthe support with respect. to the 'Ipost or..frame.. Ordinarily .the anghlar-adjust rnent of the support with respect to theffrafrne need only be very little, and consequently the adjusting method illustrated is satisfactory. It is clearv that if, agreater degree of adjustment should be desired, a' nutmoimting may. be provideo upon the, support so that the great angulanvariation oithe support with respect 'to. the "sciewjors rame can be accommodat'ed: for.

support. r4 carries. 'alblock or rest. 21. weigh hasa groove 22 extendinglongitudinally thereof I whichgreceivestherod,tube.or cylindrical part to. Y .be ground and supports thesame during. the g'rindingthereof., For grinding a taper; the groove ZLWill taper asishown particularly in.Fig' ure 3. The groove; has a relatively flat orhoriz ontal .po'rtio n for. supporting the rod or tub e Tand-fthe side is inclined to provide I a. guide for the tube or rodrv llhe rest rnay b'etempered in orderto resistwean.

, 'The block or rest 21 is mountediupon the'su pport I I. for angular adjustmentthereupon. The mounting particularly illustrated includes a screw 23 which passes. throughahole which preferably islocated'centrally of thefrest-an d isrthreaded into the suppo rt sothat the. rest is rotatable or :adjustable angularly upon the screw} .Means are 7 provided for adjusting the anigular position :o-f the rest. 21 upon the support. 'I'he means particularly illustratedincludes' a pairof horizontally disposed screws 24 and 25 which are threadedly received in an upwardlyo extending flange car .ri'ed'bythe'support' and engage the back face offtheblock or rest, one on each side of" the pivot .screw' ;23i By loosening'one screw and tightening l'thef'other, the angular position of the rest" may directs the rod or tube into the groove 22.

"are hardened.

be adjusted at will. The advantage of the two screw adjusting means for the rest lies in the fact that the rest is firmly locked in adjusted position since one screw opposes the other. The screw 23 may also be used to assist in locking the rest or block in adjusted position.

Guide means is carried by the grinding device for guiding the rod or tube into the groove 22. The guide means particularly illustrated includes a plate 28- which may be suitably fastened to any part of the grinding device. The plate is shown as being secured to the end of the block 2| by means of a screw 29. used to hold the guide plate in proper position. The guide plate carries a guide hole 3| whic The grinding devic may be provided'with a suitable stop for the rod or tube to be ground.-

The stop is shown as being a stop plate '33 which may be carried upon the other end of the block" 2| and maybe secured thereto by means of a A pin 30 may be;

may be otherwise mounted thanupon the block 2| as desired in'which' case mounting .is requiredw'nich will notobs truct or will permitja desired amount of angular adjustment of: the

block tobe made. In such case tooit isldefsirable thatthe guide hole be position'edin alignmerit with thegroove 22;

'Wards the grinding block Zlso thattheend of the tube or rod Typasses through the guide hole 3 and into the groove or's lot 22. The grinding :vvheel tendsjto'force the tubeor rod. downwardly so that it "rides'upon the bottom or horizontal portion of the groove, the chuck rot-ating the rod or tubeduring the grinding opera-tionjfThe inclined wall of the groove guides the rod, and

grinding wheel and consequently it'is I with a; taper Preferably the chuck 3] is con-"- I nected with a suitableflexible shaft 38 which intuz n is'connect'eclwith' a motor or 'driveshaft (not shown"); so that maximum flexibility is obv tained for inserting the rod or tube to befground into the chuck and maximum convenience in inserting the sameintogri'ndin'g position in the slot 22 through the'guide hole 3|,

Although the rest orgrinding blo'c desired, in which case the direction'of-thegrinding wheel must bereversed sothat the pressure of the wheel upon the needle presses the latter 4 a t T held in the chuck 31 whichisirotated in any suitable opposite to. the direction; 'of rotation of the is shown with the "horizontal partof the gro ers down position, "the block may berevers ed," if

" since the 'groove'is' tapered, the tube'T isguided at anan'gle with respect tothe periphery of the against the horizontal side of thegroove. Since the'needle to be groundjis very fine, in fact about .010 of an inch or'finer at its smaller end, the

For maximum wear the grinding block and stop This invention is presented to r na-tier grinding block Zl'engagesor practicallyeng ages the grinding wheel. Forthis" reason theia c e of the block preferably has a curvature corresponding with the curvature :of the} grinding wheel.

" riphery thereof, means mounting the rest, means for adjusting fthe angular position and the forward position of the rest, a portable chuck for holding the cylindrical part to be ground and for rotatingflthe same, a flexible shaft connected with the chuck so that it is movable for inserting the cylindrical part to be ground into the supporting means carried by the rest, and a guide means in alignment with the supporting means carried" by the restto guide the part to be ground. I 1

- 2; A grinding combination comprising" a rest 1 having work-supporting means to receive a cylindrical partto be ground by engaging the peripherythereof, means mounting the rest, means for adjusting the angular position and the forward position of the rest, a portable chuck for holding the cylindrical part to 'be ground and for rotating the same, a flexible shaft connected with the chuck so that it is movable'for insert ing the cylindrical part to be groundinto the supporting means carried by the rest, a guide means in alignment with the supporting means carried by the rest to guide the part to be *ground and a stop at the end of the work-supporting means.

l 1 A grinding device for grinding a taper comprising a frame, a'j support adjustably carried by g the frame, a rest pivotally mountedupon the supportand having'a groove of gradually decreasingdep'th in the face thereof and extending transversely thereof to support a part to be ground'by engaging two pointsof the periphery thereof, and meansto adjust the pivotalposition of the rest and to lock the samein adjusted "positiong 4. A grinding device for grinding 'a ta per comprising a frame, a support adju'stably carried by .the framepa rest'pivotally mounted upon the support between its ends and havingag'r'oov'e of gradually decreasing depth to support a cylin 'drical part to be taper ground by engaging the periphery thereof, means carried bythe support to adjustth'e pivotalposition of the restand to 1 look the same in adjusted position, and a-gu'i'd'e carried uponthe end of the restand'in alignment with the groove to guide the part to beground justing the'position of the support-with respect to the frame,'a rest mounted'uponthe support for angular adjustment and having-a groove of gradually decreasing depth to support a part to be l taperfground by engaging the' periphery thereof, means to adjust the angular position of the rest and to lock the sa e-m. adjusted posi: tion,' a guide carried uponthe end of the rest and in alignment with the groove to guidethe part to be ground into the groove, and a stop L FIVQ 9 1 t t end i the e t. 6. A jgrindingjdevice comprising an L-Shap'ed frame including a baseand a vertically extending portion, a support pivotally carried by the base of the frame, a screw carriedby the vertically extending portion and engaging the support to adjust the position thereof, a rest mounted upon the, support for angular adjustment in a horizontal plane and having a groove to support a part to be ground by engaging the peripherythereof, and means carried by the support to adjust theangular position of the rest and to lock the same in adjusted position.

-7. A grinding device comprising an L-shaped frame including a base and a vertically extending portion, a support carried by the base of the frame upon a horizontal pivot, a screw' carried by the vertically extending portion and engaging V the supportto pivotally adjust the angularposition thereof with respect to the verticallyextending portion of the frame, a rest pivotally mounted between its ends upon the, support and having a groove to support a part to be ground by engaging the periphery thereof, and a screw engaging each end of the rest and carried by the support to adjust the position of the rest and to lock the same in adjusted position.

8. A grinding device comprisingfa frame, a

, support 'adjustably' carried by the frame, means to adjust the position of the-support upon the frame, a rest mounted upon the support for angular adjustrnentand having agroove to support a part tobe ground by engaging the'periphery thereof, means carried by the support to adjust the angular position 'of the rest and to lockthe same in adjusted position, andmeans; forming a guide, for a rod or tube to be ground in alignment with the end of the groove.

9. A grinding device comprising a frame, a

support adjustably carried by the frame, means carried by the frame and engaging the support to adjust the position thereof, a rest pivotally mounted between its endsupon the support and having a groove to support a part to be ground a by engaging the periphery thereof, a screw en- I gaging each end of the rest and carried by the support to adjust the position of the rest and to lock the same in adjusted position, and means forming a guide for a rod or tube to be ground support to adjust the position of the rest and,

to lock the same in adjusted position, means forming a guide in alignment with the end of 1 the groove, and astop means at the other endof the groove. v

11. A grinding device for grinding a-tapercomprising a; frame; a rest pivotally mounted upon the frame and having a groove'to support a part to be ground by engaging theperiphery thereof,

the groove extending longitudinally of the'f ace thereof, the groove having a side substantially at right angles to the periphery of the wheel and a guiding side at an angle thereto, the groove also having a decreasing .depth from one end to the other, and means to adjustthe pivotal po'si- ,tion of the rest and to lock the same in adjusted position.

WILLIAM FAVINI. 

